Definition
To act cautiously and avoid taking risks.
谨慎行事
To play it safe, I will leave ten minutes early, just in case.
为了安全起见，我会提早十分钟出发，以防万一。
They have always played it safe with their investments, avoiding any high-risk ventures.
他们的投资一向谨慎，避免任何高风险的项目。
Since we're unsure about the weather, it's best to play safe and wear a raincoat.
由于我们不确定天气状况，最好谨慎行事，穿件雨衣。